Related for Bava Metzia 43:7
וכי נמצאו יפות מהן תרומתו תרומה אמאי בעידנא דתרם הא לא הוה ידע תרגמה רבא אליבא דאביי דשויה שליח
without the knowledge [of the owner] the offering is valid? If one goes down into a neighbour's field, collects [the produce] and sets apart the heave-offering, without permission, if [the owner objects to the action and] considers it robbery, the offering is not valid, but if not, it is valid. And how can one tell whether [the owner] considers it as robbery or not? If the owner, on arriving and finding the person [in the field], says to him: You should have gone and taken the better kind [of the produce for the heave-offering], the offering is valid if there is a better kind to be found [in the field], but if not, it is not valid. If the owner collected [more of the produce] and added it [to the offering] it is valid in any case.<span class="x" onmousemove="('comment',' V. Kid. 52b. ');"><sup>11</sup></span> Thus [we see that] if there is a better kind [in the field] the offering is valid. But [is this so?] surely at the time when the offering was set apart [the owner] did not know it?<span class="x" onmousemove="('comment',' It must therefore be concluded that 'anticipated knowledge' is as good as real knowledge. In the same way 'anticipated abandonment' should be deemed as valid as real abandonment, in contradiction to Abaye. ');"><sup>12</sup></span>